/*
 * md5.h
 *
 *  Created on: Nov 20, 2015
 *      Author: GaomingPan
 */

#ifndef SRC_MD5_H_
#define SRC_MD5_H_

typedef struct
{
    unsigned int count[2];
    unsigned int state[4];
    unsigned char buffer[64];

}MD5_CTX;


#define F(x,y,z) ((x & y) | (~x & z))

#define G(x,y,z) ((x & z) | (y & ~z))

#define H(x,y,z) (x^y^z)

#define I(x,y,z) (y ^ (x | ~z))

#define ROTATE_LEFT(x,n) ((x << n) | (x >> (32-n)))

#define FF(a,b,c,d,x,s,ac) \
{ \
    a += F(b,c,d) + x + ac; \
    a = ROTATE_LEFT(a,s); \
    a += b; \
}

#define GG(a,b,c,d,x,s,ac) \
{ \
    a += G(b,c,d) + x + ac; \
    a = ROTATE_LEFT(a,s); \
    a += b; \
}

#define HH(a,b,c,d,x,s,ac) \
{ \
    a += H(b,c,d) + x + ac; \
    a = ROTATE_LEFT(a,s); \
    a += b; \
}

#define II(a,b,c,d,x,s,ac) \
{ \
    a += I(b,c,d) + x + ac; \
    a = ROTATE_LEFT(a,s); \
    a += b; \
}

void MD5Init(MD5_CTX *context);

void MD5Update(MD5_CTX *context,unsigned char *input,unsigned int inputlen);

void MD5Final(MD5_CTX *context,unsigned char digest[16]);

void MD5Transform(unsigned int state[4],unsigned char block[64]);

void MD5Encode(unsigned char *output,unsigned int *input,unsigned int len);

void MD5Decode(unsigned int *output,unsigned char *input,unsigned int len);

void md5Sum(char *input, char *output);

#endif /* SRC_MD5_H_ */
